'use strict';

// Do this as the first thing so that any code reading it knows the right env.
process.env.BABEL_ENV = 'test';
process.env.NODE_ENV = 'test';
process.env.PUBLIC_URL = '';

// Makes the script crash on unhandled rejections instead of silently
// ignoring them. In the future, promise rejections that are not handled will
// terminate the Node.js process with a non-zero exit code.
process.on('unhandledRejection', err => {
		throw err;
});

// Ensure environment variables are read.
require('../config/env');


const jest = require('jest');
const execSync = require('child_process').execSync;
let argv = process.argv.slice(2);

function isInGitRepository() {
		try {
				execSync('git rev-parse --is-inside-work-tree', { stdio: 'ignore' });
				return true;
		} catch (e) {
				return false;
		}
}

function isInMercurialRepository() {
		try {
				execSync('hg --cwd . root', { stdio: 'ignore' });
				return true;
		} catch (e) {
				return false;
		}
}

// Watch unless on CI or explicitly running all tests
if (
		!process.env.CI &&
				argv.indexOf('--watchAll') === -1 &&
				argv.indexOf('--watchAll=false') === -1
) {
		// https://github.com/facebook/create-react-app/issues/5210
		const hasSourceControl = isInGitRepository() || isInMercurialRepository();
		argv.push(hasSourceControl ? '--watch' : '--watchAll');
}


jest.run(argv);
